Small Craft Advisory 311, NWS Anchorage, AK

349 
FZAK52 PAFC 171511 AAA
CWFALU

Coastal Waters Forecast...UPDATED
National Weather Service Anchorage AK
711 AM AKDT Sat Apr 17 2021

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-180315-
711 AM AKDT Sat Apr 17 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

SEMISOPOCHNOI VOLCANO, 140 NM NORTHWEST OF ADAK IS CURRENTLY 
ACTIVE.

A 1005 mb low 450 nm west of St Matthew Island moves to 300 nm 
west of St Matthew Island at 1020 mb Sun morning and dissipates. 
Its front moves eastward then stalls over the Central Aleutians and 
central Bering through Sunday morning and weakens. A trough from the 
North Pacific enters the eastern Bering Sat night and drifts westward
through Pribilof Islands through Sun afternoon.

$$

PKZ150-180315-
South of the AK Peninsula Sitkinak to Castle Cape-
711 AM AKDT Sat Apr 17 2021

...GALE WARNING SUNDAY...

.TODAY...E wind 25 kt. Seas 7 ft. 
.TONIGHT...NE wind 25 kt. Seas 9 ft. Rain. 
.SUN...NE wind 35 kt. Seas 11 ft. 
.SUN NIGHT...NE wind 40 kt. Seas 13 ft. 
.MON THROUGH WED...E wind 30 kt. Seas 13 ft.

$$

PKZ155-180315-
South of the AK Peninsula Castle Cape to Cape Sarichef-
711 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY TONIGHT AND SUNDAY...

.TODAY...NE wind 20 kt. Seas 5 ft. 
.TONIGHT...N wind 20 kt except NE 25 kt from the Shumagin Islands
E. Seas 6 ft. 
.SUN...NE wind 30 kt. Seas 7 ft. 
.SUN NIGHT...NE wind 35 kt. Seas 10 ft. 
.MON THROUGH WED...E wind 30 kt. Seas 15 ft.

$$

PKZ160-180315-
Bristol Bay-
711 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 20 kt. Seas in ice free waters 3 ft. 
.TONIGHT...NE wind 15 kt. Seas in ice free waters 3 ft. 
.SUN...NE wind 20 kt. Seas in ice free waters 3 ft. 
.SUN NIGHT...NE wind 35 kt. Seas in ice free waters 5 ft. 
.MON...NE wind 30 kt. Seas in ice free waters 5 ft. 
.TUE...NE wind 25 kt. Seas in ice free waters 4 ft. 
.WED...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ165-180315-
Port Heiden to Cape Sarichef-
711 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 20 kt. Seas 5 ft. 
.TONIGHT...NE wind 20 kt. Seas 5 ft. 
.SUN...NE wind 20 kt. Seas 5 ft. 
.SUN NIGHT...NE wind 30 kt. Seas 7 ft. 
.MON...NE wind 25 kt. Seas 8 ft. 
.TUE THROUGH WED...NE wind 30 kt. Seas 11 ft.

$$

PKZ170-180315-
Cape Sarichef to Nikolski Bering Side-
711 AM AKDT Sat Apr 17 2021

.TODAY...Variable wind 10 kt. Seas 5 ft. 
.TONIGHT...N wind 15 kt. Seas 4 ft. 
.SUN...N wind 20 kt. Seas 5 ft. 
.SUN NIGHT...N wind 30 kt. Seas 8 ft. 
.MON THROUGH WED...NE wind 30 kt. Seas 11 ft.

$$

PKZ171-180315-
Unalaska Bay-
711 AM AKDT Sat Apr 17 2021

.TODAY...Variable wind less than 10 kt becoming E 10 kt in the
afternoon. Seas 3 ft. 
.TONIGHT...NE wind 10 kt. Seas 3 ft. 
.SUN...NW wind 15 kt. Seas 3 ft. 
.SUN NIGHT...N wind 20 kt. Seas 5 ft. 
.MON...NE wind 20 kt. Seas 7 ft. 
.TUE THROUGH WED...NE wind 25 kt. Seas 10 ft.

$$

PKZ172-180315-
Cape Sarichef to Nikolski Pacific Side-
711 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 15 kt. Seas 5 ft. 
.TONIGHT...N wind 20 kt. Seas 4 ft. 
.SUN...N wind 20 kt. Seas 4 ft. 
.SUN NIGHT...N wind 25 kt. Seas 6 ft. 
.MON...NE wind 25 kt. Seas 13 ft. 
.TUE THROUGH WED...NE wind 30 kt. Seas 14 ft.

$$

PKZ173-180315-
Nikolski to Seguam Island Bering Side-
711 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 4 ft. 
.TONIGHT...Variable wind 10 kt. Seas 3 ft. 
.SUN...N wind 20 kt. Seas 6 ft. 
.SUN NIGHT...N wind 30 kt. Seas 8 ft. 
.MON...N wind 30 kt. Seas 11 ft. 
.TUE THROUGH WED...NE wind 25 kt. Seas 11 ft.

$$

PKZ174-180315-
Nikolski to Seguam Island Pacific Side-
711 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 4 ft. 
.TONIGHT...Variable wind 10 kt. Seas 4 ft. 
.SUN...N wind 20 kt. Seas 5 ft. 
.SUN NIGHT...N wind 30 kt. Seas 8 ft. 
.MON...N wind 30 kt. Seas 11 ft. 
.TUE THROUGH WED...N wind 25 kt. Seas 11 ft.

$$

PKZ175-180315-
Seguam Island to Adak Bering Side-
711 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...SE wind 25 kt. Seas 5 ft.
.TONIGHT...SE wind 20 kt. Seas 7 ft.
.SUN...NE wind 15 kt. Seas 7 ft.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 12 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.


$$

PKZ176-180315-
Seguam Island to Adak Pacific Side-
711 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...S wind 25 kt. Seas 7 ft.
.TONIGHT...SE wind 25 kt diminishing to 15 kt after midnight. 
Seas 8 ft.
.SUN...Variable wind 10 kt. Seas 7 ft.
.SUN NIGHT...N wind 30 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 9 ft.

$$

PKZ177-180315-
Adak to Kiska-
711 AM AKDT Sat Apr 17 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NW wind 25 kt increasing to 35 kt in the afternoon. 
Seas 11 ft. Rain.
.TONIGHT...N wind 35 kt. Seas 12 ft. Rain.
.SUN...N wind 30 kt. Seas 9 ft.
.SUN NIGHT...N wind 20 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 9 ft.
.TUE...N wind 25 kt. Seas 9 ft.
.WED...N wind 20 kt. Seas 8 ft.

$$

PKZ178-180315-
Kiska to Attu-
711 AM AKDT Sat Apr 17 2021

...GALE WARNING TODAY...

.TODAY...NW wind 35 kt. Seas 14 ft.
.TONIGHT...NW wind 30 kt. Seas 11 ft.
.SUN...NW wind 20 kt. Seas 8 ft.
.SUN NIGHT...N wind 20 kt. Seas 6 ft.
.MON THROUGH WED...N wind 20 kt. Seas 7 ft.

$$

PKZ179-180315-
Pribilof Islands Near Shore Waters-
711 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 5 ft. 
.TONIGHT...Variable wind 10 kt. Seas 4 ft. 
.SUN...N wind 20 kt. Seas 5 ft. 
.SUN NIGHT...N wind 25 kt. Seas 7 ft. 
.MON...NE wind 30 kt. Seas 9 ft. 
.TUE THROUGH WED...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-180315-
Kuskokwim Delta and Etolin Strait-
711 AM AKDT Sat Apr 17 2021

.TODAY...E wind 20 kt. Seas in ice free waters 4 ft. 
.TONIGHT...NE wind 15 kt. Seas in ice free waters 4 ft. 
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft. 
.SUN NIGHT...NE wind 30 kt. Seas in ice free waters 5 ft. 
.MON THROUGH WED...NE wind 25 kt. Seas in ice free waters 6 ft.

$$

PKZ181-180315-
North and West of Nunivak Island-
711 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas in ice free waters 3 ft. Freezing
spray. 
.TONIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft. 
.SUN...N wind 20 kt. Seas in ice free waters 4 ft. Freezing
spray. 
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 3 ft. 
.MON...N wind 30 kt. Seas in ice free waters 4 ft. 
.TUE...NE wind 25 kt. Seas in ice free waters 3 ft. 
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.

$$

PKZ185-180315-
Saint Matthew Island Waters-
711 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SE wind 20 kt E of Saint Matthew Island...S 30 kt 
W of Saint Matthew Island. Seas in ice free waters 11 ft. 
Freezing spray in the morning. 
.TONIGHT...SE wind 15 kt E of Saint Matthew Island...S 25 kt 
W of Saint Matthew Island. Seas in ice free waters 10 ft. 
.SUN...N wind 20 kt E of Saint Matthew Island...SE 15 kt W of
Saint Matthew Island. Seas in ice free waters 7 ft. 
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 6 ft. 
.MON...N wind 30 kt. Seas in ice free waters 6 ft. 
.TUE...NE wind 25 kt. Seas in ice free waters 6 ft. 
.WED...NE wind 20 kt. Seas in ice free waters 6 ft.

$$

504 
FZAK52 PAFC 172312
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
312 PM AKDT Sat Apr 17 2021

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-181200-
312 PM AKDT Sat Apr 17 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 1013 mb low 320 nm west of Saint Matthew Island moves to 270 nm
west of Saint Matthew Island at 1030 mb Sun afternoon and
dissipates. Its front remains stationary over the Bering and 
central Aleutians through Sunday, then tapers off Sun night. A 
front from the North Pacific extends to the eastern Bering tonight
and moves westward through Pribilof Islands and the Aleutians 
through Mon afternoon.

$$

PKZ150-181200-
South of the AK Peninsula Sitkinak to Castle Cape-
312 PM AKDT Sat Apr 17 2021

...GALE WARNING SUNDAY AND SUNDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas 7 ft. Rain showers.
.SUN...NE wind 25 kt increasing to 35 kt in the afternoon. Seas 9 
ft. Rain.
.SUN NIGHT...NE wind 35 kt. Seas 11 ft.
.MON...NE wind 35 kt. Seas 16 ft.
.MON NIGHT...SE wind 30 kt. Seas 14 ft.
.TUE THROUGH WED...E wind 30 kt. Seas 13 ft.
.THU...NE wind 15 kt. Seas 10 ft.

$$

PKZ155-181200-
South of the AK Peninsula Castle Cape to Cape Sarichef-
312 PM AKDT Sat Apr 17 2021

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...N wind 20 kt except NE 25 kt from the Shumagin Islands
E. Seas 5 ft.
.SUN...N wind 20 kt except NE 30 kt from the Shumagin Islands E. Seas
6 ft.
.SUN NIGHT...NE wind 35 kt. Seas 10 ft. Rain.
.MON AND MON NIGHT...E wind 30 kt. Seas 12 ft.
.TUE THROUGH WED...E wind 30 kt. Seas 15 ft.
.THU...NE wind 15 kt. Seas 9 ft.

$$

PKZ160-181200-
Bristol Bay-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...NE wind 15 kt. Seas in ice free waters 2 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 2 ft.
.SUN NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.MON AND MON NIGHT...E wind 30 kt. Seas in ice free waters 4 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 4 ft.
.WED...NE wind 20 kt. Seas in ice free waters 4 ft.
.THU...NE wind 15 kt. Seas in ice free waters 2 ft.

$$

PKZ165-181200-
Port Heiden to Cape Sarichef-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...NE wind 20 kt. Seas 4 ft.
.SUN...NE wind 20 kt. Seas 4 ft.
.SUN NIGHT...NE wind 30 kt. Seas 6 ft.
.MON AND MON NIGHT...NE wind 30 kt. Seas 8 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 11 ft.
.THU...E wind 15 kt. Seas 4 ft.

$$

PKZ170-181200-
Cape Sarichef to Nikolski Bering Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...N wind increasing to 15 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 4 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...NE wind 30 kt. Seas 10 ft.
.MON NIGHT...NE wind 25 kt. Seas 9 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 11 ft.
.THU...E wind 15 kt. Seas 7 ft.

$$

PKZ171-181200-
Unalaska Bay-
312 PM AKDT Sat Apr 17 2021

.TONIGHT...N wind 10 kt. Seas 3 ft.
.SUN...N wind 10 kt becoming NW in the afternoon. Seas 3 ft.
.SUN NIGHT...NW wind 15 kt. Seas 5 ft.
.MON AND MON NIGHT...NE wind 15 kt. Seas 5 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 10 ft.
.THU...E wind 10 kt. Seas 2 ft.

$$

PKZ172-181200-
Cape Sarichef to Nikolski Pacific Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 4 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON AND MON NIGHT...NE wind 25 kt. Seas 8 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 14 ft.
.THU...E wind 15 kt. Seas 9 ft.

$$

PKZ173-181200-
Nikolski to Seguam Island Bering Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...E wind 15 kt. Seas 4 ft.
.SUN...Variable wind 10 kt becoming NE 20 kt in the afternoon. Seas 
6 ft.
.SUN NIGHT...N wind 25 kt. Seas 7 ft.
.MON AND MON NIGHT...NE wind 30 kt. Seas 11 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 11 ft.
.THU...E wind 15 kt. Seas 8 ft.

$$

PKZ174-181200-
Nikolski to Seguam Island Pacific Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN... Variable wind 10 kt becoming N 15 kt in the afternoon. Seas 
5 ft.
.SUN NIGHT...N wind 25 kt. Seas 7 ft.
.MON AND MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.
.THU...E wind 15 kt. Seas 9 ft.

$$

PKZ175-181200-
Seguam Island to Adak Bering Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY AND SUNDAY NIGHT...

.TONIGHT...SE wind 20 kt. Seas 7 ft. Rain and snow.
.SUN...Variable wind 10 kt. Seas 8 ft.
.SUN NIGHT...NE wind 15 kt becoming N 25 kt after midnight. Seas 6 
ft.
.MON AND MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.
.THU...NE wind 15 kt. Seas 8 ft.

$$

PKZ176-181200-
Seguam Island to Adak Pacific Side-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY TONIGHT AND SUNDAY NIGHT...

.TONIGHT...SE wind 25 kt. Seas 8 ft. Rain and snow.
.SUN...E wind 15 kt. Seas 7 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON AND MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 8 ft.
.THU...NE wind 20 kt. Seas 8 ft.

$$

PKZ177-181200-
Adak to Kiska-
312 PM AKDT Sat Apr 17 2021

...GALE WARNING TONIGHT...

.TONIGHT...N wind 35 kt. Seas 12 ft. Rain and snow showers.
.SUN...N wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft.
.SUN NIGHT...N wind 20 kt. Seas 6 ft.
.MON...N wind 25 kt. Seas 6 ft.
.MON NIGHT...N wind 30 kt. Seas 9 ft.
.TUE...N wind 25 kt. Seas 9 ft.
.WED...N wind 20 kt. Seas 8 ft.
.THU...NE wind 20 kt. Seas 8 ft.

$$

PKZ178-181200-
Kiska to Attu-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH SUNDAY...

.TONIGHT...NW wind 30 kt. Seas 11 ft.
.SUN...NW wind 25 kt. Seas 8 ft.
.SUN NIGHT...N wind 20 kt. Seas 6 ft.
.MON...NE wind 15 kt. Seas 4 ft.
.MON NIGHT...NE wind 25 kt. Seas 5 ft.
.TUE THROUGH THU...NE wind 20 kt. Seas 9 ft.

$$

PKZ179-181200-
Pribilof Islands Near Shore Waters-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 5 ft.
.SUN...N wind 20 kt. Seas 5 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON AND MON NIGHT...NE wind 30 kt. Seas 9 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.WED...NE wind 25 kt. Seas 9 ft.
.THU...NE wind 15 kt. Seas 7 ft.

$$

PKZ180-181200-
Kuskokwim Delta and Etolin Strait-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY SUNDAY NIGHT...

.TONIGHT...NE wind 15 kt. Seas in ice free waters 4 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 4 ft.
.MON...NE wind 25 kt. Seas in ice free waters 5 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.
.WED...NE wind 25 kt. Seas in ice free waters 6 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ181-181200-
North and West of Nunivak Island-
312 PM AKDT Sat Apr 17 2021

.TONIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft.
.SUN...N wind 20 kt. Seas in ice free waters 3 ft.
.SUN NIGHT...N wind 20 kt. Seas in ice free waters 3 ft.
.MON AND MON NIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 4 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ185-181200-
Saint Matthew Island Waters-
312 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY TONIGHT AND SUNDAY NIGHT...

.TONIGHT...SE wind 15 kt E of Saint Matthew Island... SE 25 kt W of 
Saint Matthew Island. Seas in ice free waters 9 ft.
.SUN...E wind 15 kt becoming N in the afternoon. Seas in ice free 
waters 7 ft.
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 5 ft.
.MON AND MON NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft.
.WED...NE wind 20 kt. Seas in ice free waters 6 ft.
.THU...NE wind 15 kt. Seas in ice free waters 5 ft.

$$

404 
FZAK52 PAFC 181143
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
343 AM AKDT Sun Apr 18 2021

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-190015-
343 AM AKDT Sun Apr 18 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A front in the Western Bering remains stationary as it weakens
through Sun evening. A low with multiple centers moves 200 nm
south of Chignik Mon afternoon at 999 mb then to 200 nm south of
Dutch Harbor at 1003 mb Tue morning.

$$

PKZ150-190015-
South of the AK Peninsula Sitkinak to Castle Cape-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING THROUGH MONDAY...

.TODAY...NE wind 25 kt increasing to 35 kt in the afternoon. Seas 9 
ft.
.TONIGHT...NE wind 35 kt. Seas 11 ft.
.MON...NE wind 35 kt. Seas 14 ft. Rain.
.MON NIGHT...SE wind 30 kt. Seas 13 ft.
.TUE THROUGH WED...E wind 30 kt. Seas 12 ft.
.THU...NE wind 15 kt. Seas 9 ft.

$$

PKZ155-190015-
South of the AK Peninsula Castle Cape to Cape Sarichef-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING TONIGHT...

.TODAY...N wind 20 kt except NE 30 kt from the Shumagin Islands E.
Seas 6 ft.
.TONIGHT...N wind 35 kt. Seas 10 ft. Rain.
.MON...NE wind 30 kt. Seas 9 ft.
.MON NIGHT...E wind 30 kt. Seas 12 ft.
.TUE...E wind 30 kt. Seas 12 ft.
.WED...NE wind 35 kt. Seas 15 ft.
.THU...NE wind 20 kt. Seas 11 ft.

$$

PKZ160-190015-
Bristol Bay-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...NE wind 20 kt. Seas in ice free waters 3 ft.
.TONIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.MON...NE wind 30 kt. Seas in ice free waters 4 ft.
.MON NIGHT...E wind 30 kt. Seas in ice free waters 5 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 4 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ165-190015-
Port Heiden to Cape Sarichef-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...NE wind 20 kt. Seas 4 ft.
.TONIGHT...NE wind 30 kt. Seas 6 ft.
.MON...NE wind 30 kt. Seas 8 ft. Rain.
.MON NIGHT...NE wind 30 kt. Seas 8 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 4 ft.

$$

PKZ170-190015-
Cape Sarichef to Nikolski Bering Side-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...N wind 20 kt. Seas 4 ft.
.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 10 ft. Rain.
.MON NIGHT...NE wind 25 kt. Seas 10 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.

$$

PKZ171-190015-
Unalaska Bay-
343 AM AKDT Sun Apr 18 2021

.TODAY...N wind 10 kt becoming NW in the afternoon. Seas 3 ft.
.TONIGHT...NW wind 15 kt. Seas 5 ft. Rain.
.MON...N wind 15 kt diminishing to 10 kt in the afternoon. Seas 5
ft subsiding to 3 ft in the afternoon. Widespread rain showers.
.MON NIGHT...NE wind 15 kt. Seas 5 ft.
.TUE...NE wind 20 kt. Seas 5 ft.
.WED...NE wind 25 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 3 ft.

$$

PKZ172-190015-
Cape Sarichef to Nikolski Pacific Side-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...N wind 20 kt. Seas 4 ft.
.TONIGHT...N wind 30 kt. Seas 7 ft.
.MON...N wind 25 kt. Seas 8 ft. Rain.
.MON NIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 30 kt. Seas 13 ft.
.WED...NE wind 35 kt. Seas 15 ft.
.THU...NE wind 25 kt. Seas 12 ft.

$$

PKZ173-190015-
Nikolski to Seguam Island Bering Side-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY...

.TODAY...Variable wind 10 kt becoming NE 20 kt in the afternoon.
Seas 6 ft.
.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 35 kt. Seas 11 ft. Rain.
.MON NIGHT...NE wind 30 kt. Seas 11 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.
.THU...NE wind 20 kt. Seas 7 ft.

$$

PKZ174-190015-
Nikolski to Seguam Island Pacific Side-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY...

.TODAY...N wind 15 kt. Seas 5 ft.
.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 35 kt. Seas 10 ft. Rain.
.MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE...NE wind 25 kt. Seas 9 ft.
.WED...N wind 25 kt. Seas 13 ft.
.THU...NE wind 20 kt. Seas 12 ft.

$$

PKZ175-190015-
Seguam Island to Adak Bering Side-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY...

.TODAY...E wind 10 kt. Seas 8 ft.
.TONIGHT...N wind 15 kt increasing to 25 kt after midnight. Seas 6 
ft.
.MON...N wind 35 kt. Seas 9 ft.
.MON NIGHT...N wind 35 kt. Seas 11 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.
.THU...NE wind 20 kt. Seas 7 ft.

$$

PKZ176-190015-
Seguam Island to Adak Pacific Side-
343 AM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY...

.TODAY...E wind 15 kt. Seas 7 ft.
.TONIGHT...N wind 25 kt. Seas 5 ft.
.MON...N wind 35 kt. Seas 9 ft.
.MON NIGHT...N wind 35 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 8 ft.
.THU...NE wind 20 kt. Seas 10 ft.

$$

PKZ177-190015-
Adak to Kiska-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TODAY AND MONDAY...

.TODAY...N wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft.
.TONIGHT...N wind 20 kt. Seas 6 ft.
.MON...N wind 25 kt. Seas 5 ft.
.MON NIGHT...N wind 30 kt. Seas 8 ft.
.TUE...N wind 25 kt. Seas 9 ft.
.WED...N wind 20 kt. Seas 8 ft.
.THU...NE wind 25 kt. Seas 7 ft.

$$

PKZ178-190015-
Kiska to Attu-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NW wind 25 kt. Seas 8 ft.
.TONIGHT...N wind 20 kt. Seas 6 ft.
.MON...NE wind 15 kt. Seas 4 ft.
.MON NIGHT...NE wind 25 kt. Seas 4 ft.
.TUE THROUGH WED...NE wind 20 kt. Seas 8 ft.
.THU...NE wind 25 kt. Seas 7 ft.

$$

PKZ179-190015-
Pribilof Islands Near Shore Waters-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...North wind 10 kt increasing to 20 kt in the afternoon. Seas
5 ft.
.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 8 ft.
.MON NIGHT...NE wind 30 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.WED...NE wind 25 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 5 ft.

$$

PKZ180-190015-
Kuskokwim Delta and Etolin Strait-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...NE wind 20 kt. Seas in ice free waters 4 ft.
.TONIGHT...N wind 25 kt. Seas in ice free waters 4 ft.
.MON...NE wind 30 kt. Seas in ice free waters 6 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.
.WED...NE wind 25 kt. Seas in ice free waters 4 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ181-190015-
North and West of Nunivak Island-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY MONDAY...

.TODAY...N wind 20 kt. Seas in ice free waters 3 ft.
.TONIGHT...N wind 20 kt. Seas in ice free waters 3 ft.
.MON...N wind 30 kt. Seas in ice free waters 4 ft.
.MON NIGHT...NE wind 35 kt. Seas in ice free waters 5 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 4 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...N wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ185-190015-
Saint Matthew Island Waters-
343 AM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY TONIGHT AND MONDAY...

.TODAY...E wind 15 kt. Seas in ice free waters 7 ft.
.TONIGHT...N wind 25 kt. Seas in ice free waters 5 ft.
.MON...N wind 30 kt. Seas in ice free waters 6 ft.
.MON NIGHT...NE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft.
.WED...N wind 20 kt. Seas in ice free waters 5 ft.
.THU...NE wind 15 kt. Seas in ice free waters 4 ft.

$$

632 
FZAK52 PAFC 182335
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
335 PM AKDT Sun Apr 18 2021

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-191215-
335 PM AKDT Sun Apr 18 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A weak low in the Western Bering will remain stationary as it 
decays through Mon morning. A low with multiple centers moves 140
nm south of Perryville Mon afternoon at 998 mb then to 250 nm 
south of Dutch Harbor at 1003 mb Tue morning.

$$

PKZ150-191215-
South of the AK Peninsula Sitkinak to Castle Cape-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING THROUGH MONDAY...

.TONIGHT...NE wind 35 kt. Seas 10 ft. Rain showers.
.MON...NE wind 35 kt. Seas 15 ft. Rain showers.
.MON NIGHT...E wind 30 kt becoming SE 20 kt after midnight. Seas
14 ft. Rain showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...E wind 35 kt. Seas 11 ft.
.WED...E wind 35 kt. Seas 15 ft.
.THU THROUGH FRI...N wind 15 kt. Seas 8 ft.

$$

PKZ155-191215-
South of the AK Peninsula Castle Cape to Cape Sarichef-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 10 ft. Rain.
.MON...NE wind 30 kt. From the Shumagin Islands E, NE wind 25 kt
increasing to 35 kt in the afternoon. Seas 11 ft. Rain showers.
.MON NIGHT...NE wind 25 kt. From the Shumagin Islands E, E wind
35 kt diminishing to 25 kt after midnight. Seas 13 ft. Rain
showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...NE wind 40 kt. Seas 12 ft.
.WED...E wind 40 kt. Seas 16 ft.
.THU...NE wind 20 kt. Seas 11 ft.
.FRI...Variable wind 10 kt. Seas 7 ft.

$$

PKZ160-191215-
Bristol Bay-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.MON...NE wind 30 kt. Seas in ice free waters 3 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...E wind 25 kt. Seas in ice free waters 3 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 3 ft.
.WED...NE wind 30 kt. Seas in ice free waters 4 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.
.FRI...W wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ165-191215-
Port Heiden to Cape Sarichef-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...NE wind 30 kt. Seas 8 ft.
.MON NIGHT...NE wind 30 kt. Seas 9 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 7 ft.
.WED...NE wind 35 kt. Seas 10 ft.
.THU...NE wind 15 kt. Seas 4 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ170-191215-
Cape Sarichef to Nikolski Bering Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 10 ft. Rain.
.MON NIGHT...NE wind 30 kt. Seas 10 ft.
.TUE AND TUE NIGHT...NE wind 30 kt. Seas 11 ft.
.WED...NE wind 35 kt. Seas 10 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ171-191215-
Unalaska Bay-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 7 ft. Rain and snow.
.MON...N wind 30 kt. Seas 9 ft. Rain.
.MON NIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 30 kt. Seas 6 ft.
.WED...NE wind 30 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 3 ft.
.FRI...Variable wind less than 10 kt. Seas 3 ft.

$$

PKZ172-191215-
Cape Sarichef to Nikolski Pacific Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 8 ft.
.MON NIGHT...N wind 25 kt. Seas 8 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 35 kt. Seas 10 ft.
.WED...NE wind 40 kt. Seas 16 ft.
.THU...NE wind 25 kt. Seas 12 ft.
.FRI...Variable wind 10 kt. Seas 7 ft.

$$

PKZ173-191215-
Nikolski to Seguam Island Bering Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 11 ft.
.WED...NE wind 30 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 4 ft.

$$

PKZ174-191215-
Nikolski to Seguam Island Pacific Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 30 kt. Seas 13 ft.
.THU...NE wind 20 kt. Seas 12 ft.
.FRI...E wind 15 kt. Seas 8 ft.

$$

PKZ175-191215-
Seguam Island to Adak Bering Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...N wind 15 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 9 ft.
.THU THROUGH FRI...E wind 20 kt. Seas 6 ft.

$$

PKZ176-191215-
Seguam Island to Adak Pacific Side-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...N wind 15 kt. Seas 5 ft.
.MON...N wind 30 kt. Seas 8 ft.
.MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE...N wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 25 kt. Seas 8 ft.
.WED...N wind 30 kt. Seas 9 ft.
.THU THROUGH FRI...E wind 20 kt. Seas 10 ft.

$$

PKZ177-191215-
Adak to Kiska-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas 7 ft.
.MON...N wind 20 kt. Seas 4 ft.
.MON NIGHT...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 20 kt. Seas 8 ft.
.WED...N wind 15 kt. Seas 8 ft.
.THU THROUGH FRI...E wind 25 kt. Seas 8 ft.

$$

PKZ178-191215-
Kiska to Attu-
335 PM AKDT Sun Apr 18 2021

.TONIGHT...NW wind 15 kt becoming NE after midnight. Seas 6 ft.
.MON...NE wind 15 kt. Seas 4 ft.
.MON NIGHT...NE wind 15 kt. Seas 3 ft.
.TUE...NE wind 20 kt. Seas 6 ft.
.TUE NIGHT...NE wind 15 kt. Seas 7 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.THU...NE wind 25 kt. Seas 7 ft.
.FRI...E wind 25 kt. Seas 12 ft.

$$

PKZ179-191215-
Pribilof Islands Near Shore Waters-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 5 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ180-191215-
Kuskokwim Delta and Etolin Strait-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas in ice free waters 4 ft. Patchy
freezing fog.
.MON...NE wind 30 kt. Seas in ice free waters 6 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE AND TUE NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.WED...NE wind 30 kt. Seas in ice free waters 5 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.
.FRI...N wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ181-191215-
North and West of Nunivak Island-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas in ice free waters 4 ft. Patchy
freezing fog.
.MON...N wind 30 kt. Seas in ice free waters 4 ft.
.MON NIGHT...NE wind 40 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...N wind 15 kt. Seas in ice free waters 3 ft.
.FRI...Variable wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ185-191215-
Saint Matthew Island Waters-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas in ice free waters 5 ft.
.MON...N wind 30 kt. Seas in ice free waters 5 ft.
.MON NIGHT...NE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 7 ft.
.WED...NE wind 20 kt. Seas in ice free waters 5 ft.
.THU...NE wind 15 kt. Seas in ice free waters 4 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
419 PM AKDT Fri Apr 16 2021

.ANALYSIS AND UPPER LEVELS...A quasi-Rex Block pattern is trying
to take shape over the domain. The first ingredient a building
area of high pressure over the Bering and SW Alaska. The second
ingredient is a vertically-stacked upper level low complex south
of Sand Point. As the high shifts east and the low dips south, it
will allow for these two features to work in tandem to slow any
progress to the pattern.

At the surface, a frontal boundary is bringing rain and gusty
southerly winds through the Western Aleutians. Near Kodiak, the
remnants of a wave coming around the low are bringing scattered
rain showers from Akhiok to Chignik. Across much of the rest of
Southern AK, offshore flow is leading to mostly clear skies
allowing for a quick warm up under abundant April sunshine.

&&

.MODEL DISCUSSION...Models are in very good agreement lending to
high forecast confidence. The main issues remain some of the
details regarding the large diurnal temperature swings, especially
as it relates to any cloud cover. Fog may become an issue as we
go into the weekend with warmer air aloft trying to nose in. The
best chance for any formation would be near coastal areas/open
water sources.

&&

.AVIATION...
PANC...VFR conditions and light winds will persist. There is an
outside chance for some fog to form along Knik Arm and drift over
the terminal in the morning. However, due to the dry nature of the
airmass, confidence in any fog (or stratus) formation is low.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3)...

A Rex Block currently extends across the North Pacific with the
upper level ridge extending over Southcentral Alaska. This pattern
will continue to bring sunshine and warm temperatures across the
area over the next 3 days. As skies will remain fairly clear at
nighttime, fog is likely in coastal locations. Showers will move
across Kodiak tonight. Showers will remain rain near the coast and
snow in the higher elevations.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 3...Tonight
through Monday afternoon)...

Southwest Alaska is expected to remain quiet and dry through the
duration of the forecast period. Temperatures will mainly range
from the 40s and 50s inland to 30s and 40s closer to the coast.
Overnight lows will be able drop substantially from daytime highs
due to very good radiational cooling the next few nights due to
clear skies and light winds. Rapid snowmelt is expected to
continue for the next couple days with any melting that takes
place during the day refreezing overnight. The best chance for any
sort of rain shower activity will be mainly on a line from Egegik
to King Salmon on southward down the Alaska Peninsula to Port
Heiden and Pilot Point over the weekend into early next week.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 3...Tonight
through Monday afternoon)...

First, Semisopochnoi Volcano is currently active near Adak. Please
see marine weather statement for further details on this.

Next, a gale force frontal boundary will continue to slowly
progress eastward slowing down and stalling across the central
Bering Sea through Sunday morning. Model guidance shows this front
stalling and dissipating (frontolysis) Sunday morning near or
right over Adak. High pressure will then dominate the Western
Aleutians and the western Bering from Sunday morning through the
remainder of the forecast period.

A couple of upper level shortwaves will move northwestward on the
northern periphery of an upper level low over the North Pacific
over the weekend and into early next week. A few areas along the
Aleutian Chain namely Dutch Harbor, Cold Bay, and Sand Point may
see a rain/snow mix on Saturday/Saturday night but snow
accumulation is expected to be none for populated areas. Mainly
rain is then expected the remainder of the forecast period with
any precipitation as the air mass will be too warm.

&&

.MARINE (Days 3 through 5: Monday through Wednesday)...

Bering Sea/Aleutians:

A long-wave from the western Gulf enters the Bering and Aleutians
on Monday morning, then continues west-northwest through
Wednesday. Two separate North Pacific lows will bring strong
northerly gales with higher gusts near the Bays and Passes of the
Aleutians and AKPEN during the forecast period.

Gulf of Alaska:

A stacked North Pacific low will bring long period southerly
swells and seas up to 13 ft across the Gulf Monday and Monday
night, followed by an upper ridge by Tuesday morning. Relatively
quiet conditions are expected after Monday night.

&&

.Long Term Forecast (Days 4 through 7: Tuesday through Friday)...

A "Rex Block" Pattern will persist as the North Pacific low
continues northwestward across the Bering Sea through Wednesday.
This same low will enter the Gulf of Anadyr by Wednesday night,
leading the upper high from the Arctic to shift south-
southeastward toward the central Bering. Essentially, the high
will predominate the Bering Sea from Thursday night through
Friday afternoon. As a result, anticipate a quiet forecast period
mainly after Tuesday night.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...Gale 177 178 185.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...MSO
SOUTHCENTRAL ALASKA...ED
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...MV
MARINE/LONG TERM...CB